    <div class="refentry" id="glGenerateMipmap">
      <div class="titlepage"></div>
      <div class="refnamediv">
        <h2>Name</h2>
        <p>glGenerateMipmap — generate mipmaps for a specified texture target</p>
      </div>
      <div class="refsynopsisdiv">
        <h2>C Specification</h2>
        <div class="funcsynopsis">
          <table style="border: 0; cellspacing: 0; cellpadding: 0;" class="funcprototype-table">
            <tr>
              <td>
                <code class="funcdef">void <strong class="fsfunc">glGenerateMipmap</strong>(</code>
              </td>
              <td>GLenum <var class="pdparam">target</var><code>)</code>;</td>
            </tr>
          </table>
          <div class="funcprototype-spacer"> </div>
        </div>
      </div>
      <div class="refsect1" id="parameters">
        <h2>Parameters</h2>
        <div class="variablelist">
          <dl class="variablelist">
            <dt>
              <span class="term">
                <em class="parameter">
                  <code>target</code>
                </em>
              </span>
            </dt>
            <dd>
              <p>
                    Specifies the target to which the texture whose mimaps to generate is bound. <em class="parameter"><code>target</code></em> must
                    be <code class="constant">GL_TEXTURE_2D</code>, <code class="constant">GL_TEXTURE_3D</code>,
                    <code class="constant">GL_TEXTURE_2D_ARRAY</code> or <code class="constant">GL_TEXTURE_CUBE_MAP</code>.
                </p>
            </dd>
          </dl>
        </div>
      </div>
      <div class="refsect1" id="description">
        <h2>Description</h2>
        <p>
            <code class="function">glGenerateMipmap</code> generates mipmaps for the texture attached
            to <em class="parameter"><code>target</code></em> of the active texture unit. For cube map textures,
            a <code class="constant">GL_INVALID_OPERATION</code> error is generated if the texture
            attached to <em class="parameter"><code>target</code></em> is not cube complete.
        </p>
        <p>
            Mipmap generation replaces texel array levels
            <math overflow="scroll">

                <mrow>
                    <msub>
                        <mi mathvariant="italic">level</mi>
                        <mi>base</mi>
                    </msub>
                    <mo>+</mo>
                    <mn>1</mn>
                </mrow>
            </math>
            through
            <math overflow="scroll">
                <mrow>
                    <mi mathvariant="italic">q</mi>
                </mrow>
            </math>
            with arrays derived from the
            <math overflow="scroll">

                <mrow>
                    <msub>
                        <mi mathvariant="italic">level</mi>
                        <mi>base</mi>
                    </msub>
                </mrow>
            </math>
            array, regardless of their previous contents. All other mimap arrays,
            including the
            <math overflow="scroll">

                <mrow>
                    <msub>
                        <mi mathvariant="italic">level</mi>
                        <mi>base</mi>
                    </msub>
                </mrow>
            </math>
            array, are left unchanged by this computation.
        </p>
        <p>
            The internal formats of the derived mipmap arrays all match those of the
            <math overflow="scroll">

                <mrow>
                    <msub>
                        <mi mathvariant="italic">level</mi>
                        <mi>base</mi>
                    </msub>
                </mrow>
            </math>
            array. The contents of the derived arrays are computed by repeated, filtered
            reduction of the
            <math overflow="scroll">

                <mrow>
                    <msub>
                        <mi mathvariant="italic">level</mi>
                        <mi>base</mi>
                    </msub>
                </mrow>
            </math>
            array. For two-dimensional texture arrays, each layer is filtered
            independently.
        </p>
      </div>
      <div class="refsect1" id="errors">
        <h2>Errors</h2>
        <p>
            <code class="constant">GL_INVALID_ENUM</code> is generated if <em class="parameter"><code>target</code></em> is not
            one of the accepted texture targets.
        </p>
        <p>
            <code class="constant">GL_INVALID_OPERATION</code> is generated if <em class="parameter"><code>target</code></em> is
            <code class="constant">GL_TEXTURE_CUBE_MAP</code> and the texture bound to the <code class="constant">GL_TEXTURE_CUBE_MAP</code>
            target of the active texture unit is not cube complete.
        </p>
        <p>
            <code class="constant">GL_INVALID_OPERATION</code> is generated if the
                        <math overflow="scroll">

                <mrow>
                    <msub>
                        <mi mathvariant="italic">level</mi>
                        <mi>base</mi>
                    </msub>
                </mrow>
            </math>
                        array is stored in a compressed internal format.
        </p>
        <p>
            <code class="constant">GL_INVALID_OPERATION</code> is generated if the
                        <math overflow="scroll">

                <mrow>
                    <msub>
                        <mi mathvariant="italic">level</mi>
                        <mi>base</mi>
                    </msub>
                </mrow>
            </math>
                        array was not specified with an unsized internal format or a sized internal format that is both
                        color-renderable and texture-filterable.
        </p>
      </div>
      {$pipelinestall}{$examples}
      <div class="refsect1" id="versions">
        <h2>API Version Support</h2>
        <div class="informaltable">
          <table style="border-collapse: collapse; border-top: 2px solid ; border-bottom: 2px solid ; border-left: 2px solid ; border-right: 2px solid ; ">
            <colgroup>
              <col style="text-align: left; "/>
              <col style="text-align: center; " class="firstvers"/>
              <col style="text-align: center; "/>
              <col style="text-align: center; " class="lastvers"/>
            </colgroup>
            <thead>
              <tr>
                <th style="text-align: left; border-right: 2px solid ; ">

            </th>
                <th style="text-align: center; border-bottom: 2px solid ; " colspan="3">
                <span class="bold"><strong>OpenGL ES API Version</strong></span>
            </th>
              </tr>
              <tr>
                <th style="text-align: left; border-right: 2px solid ; border-bottom: 2px solid ; ">
                <span class="bold"><strong>Function Name</strong></span>
            </th>
                <th style="text-align: center; border-right: 2px solid ; border-bottom: 2px solid ; ">
                <span class="bold"><strong>2.0</strong></span>
            </th>
                <th style="text-align: center; border-right: 2px solid ; border-bottom: 2px solid ; ">
                <span class="bold"><strong>3.0</strong></span>
            </th>
                <th style="text-align: center; border-bottom: 2px solid ; ">
                <span class="bold"><strong>3.1</strong></span>
            </th>
              </tr>
            </thead>
            <tbody>
              <tr>
                <td style="text-align: left; border-right: 2px solid ; ">glGenerateMipmap</td>
                <td style="text-align: center; border-right: 2px solid ; ">✔</td>
                <td style="text-align: center; border-right: 2px solid ; ">✔</td>
                <td style="text-align: center; ">✔</td>
              </tr>
            </tbody>
          </table>
        </div>
      </div>
      <div class="refsect1" id="seealso">
        <h2>See Also</h2>
        <p>
            <a class="citerefentry" href="glTexImage2D"><span class="citerefentry"><span class="refentrytitle">glTexImage2D</span></span></a>,
            <a class="citerefentry" href="glBindTexture"><span class="citerefentry"><span class="refentrytitle">glBindTexture</span></span></a>,
            <a class="citerefentry" href="glGenTextures"><span class="citerefentry"><span class="refentrytitle">glGenTextures</span></span></a>
        </p>
      </div>
      <div class="refsect1" id="Copyright">
        <h2>Copyright</h2>
        <p>
            Copyright © 2010-2014 Khronos Group.
            This material may be distributed subject to the terms and conditions set forth in
            the Open Publication License, v 1.0, 8 June 1999.
            <a class="link" href="https://opencontent.org/openpub/" target="_top">https://opencontent.org/openpub/</a>.
        </p>
      </div>
    </div>
